TWAIN scanner interface

[René Ramekers]

Hello LabVIEW wizards ,

has anyone of you tried to retreive scanner-data from within LabVIEW
with a flatbed-scanner using the standard TWAIN DLL's ?
I can't seem to find any examples doing so .
Ultimately I would like to let LabVIEW automatically scan a preselected
part of an A4 page without any user-interface .

Any help is appreciated ,


René Ramekers
Océ-Technologies B.V.
The Netherlands

[mulud]

Hi,
You will be able to automate most of the process but (I believe 95% sure)
most scanner models
present you with a configuration window that you must interact with each
time
a scan is performed. You can open this window with TWAIN but it asks for
user input. I could be wrong here but I believe your problem won't be with
TWAIN but
with interfacing with proprietary scanner software to allow automated scanning.

[Alexandre V. Antonov]

Go to www.graftek.com

René Ramekers ñîîáùèë â íîâîñòÿõ
ñëåäóþùåå:38E89F05.6FA92374@oce.nl...
> Hello LabVIEW wizards ,
>
> has anyone of you tried to retreive scanner-data from within LabVIEW
> with a flatbed-scanner using the standard TWAIN DLL's ?
> I can't seem to find any examples doing so .
> Ultimately I would like to let LabVIEW automatically scan a preselected
> part of an A4 page without any user-interface .
>
> Any help is appreciated ,
>
>
> René Ramekers
> Océ-Technologies B.V.
> The Netherlands

[filmmaker]

why should anyone have to pay for $595 for a  Twain driver for Labview?

Labview should supply one if enough customers request one.  Is there some kind of illegal agreement between Graftex and NI? 

If I have to develop my own Twain driver, I will release it FREE to anyone who uses Labview.

[rolfk]

If you think the 595 $ is to much for such a driver you should simply try to write your own. You will find out that this is a very taunting task since Twain is a very complicated API to access and even more complicated to integrate into LabVIEW in a way that it works well.

And NI could of course create their own and sell it as a Toolkit but what would you gain with that? NI Tookits usually start at a higher price point than this 

[JAIMS]

Hi,

Do you have some experience with the gragtek Twain driver at CIT Netherlands?

[rolfk]

---

JAIMS wrote:

Hi,

Do you have some experience with the gragtek Twain driver at CIT Netherlands?

---

I downloaded their evaluation version once and played with it. But we use our own library for applications.I developed it mostly for the fun factor and to proof that I could do it, but if I would have had to account for the time to develop it (did alot of it in my private time) it would have been a very costly exercise 

Unfortunately I can't post this library for free and we do not intend to sell it as support would be a nightmare.

[pktao]

I've used Alliance Vision TWAIN driver for an application. It seemed ok for a few scanners I'd tested (via WIA driver).

[Andrey_Dmitriev]

Long time ago I have done very simple wrapper (based on free EZTwain Classic interface).

You can download this exercise from this topic: non-Dcam camera - get image with irfanview?

(also included in my "vision toolkit". After install just open VI from <LabVIEW 2009>\examples\ADVision\Twain Examples\)

Its free.

Hope it helps,

Andrey.